Which of the following is/are not correct ?

(a) First Five Year Plan — 1951-1956
(b) Third Five Year Plan — 1966-1971
(c) Sixth Five Year Plan — 1980-1985
(d) Tenth Five Year Plan — 2002-2007
Correct answer is
(1) (a) and (c)
(2) (b) only
(3) (c) only
(4) (a) and (d)